Playback & Playback_sine examples don't emit the inputted sound

[Ar-Ess]

Hi, I am recently new to miniaudio, and I am using the default examples to at least, get a sound and familiarize myself with the library to use it properly. My problem is that I actually have the code of the example quite similar to it (you'll see, it should not make any difference... I guess...) but I can't hear any type of sound. All the checkings return MA_SUCCESS, and whenever it should play (ma_device_start), I don't hear anything (and yeah, I have the volume up ^^).

I can provide you the code, but if you need any other information apart, just ask me and I'll provide it as quick as possible.

void DataCallback1(ma_device* pDevice, void* pOutput, const void* pInput, ma_uint32 frameCount)
{
ma_decoder* pDecoder = (ma_decoder*)pDevice->pUserData;
if (pDecoder == nullptr) return;

ma_decoder_read_pcm_frames(pDecoder, pOutput, frameCount, NULL);

(void)pInput;
}

void Audio::TestAudio1(const char* filePath) // I tried all types of file paths, going just from Output/ until starting at C:/
{
ma_result result;
ma_decoder decoder;
ma_device_config deviceConfig;
ma_device device;

result = ma_decoder_init_file(filePath, NULL, &decoder);

assert(result == MA_SUCCESS, "Could not load file: %s\n", filePath);

deviceConfig = ma_device_config_init(ma_device_type_playback);
deviceConfig.playback.format = decoder.outputFormat;
deviceConfig.playback.channels = decoder.outputChannels;
deviceConfig.sampleRate = decoder.outputSampleRate;
deviceConfig.dataCallback = DataCallback1;
deviceConfig.pUserData = &decoder;

if (ma_device_init(NULL, &deviceConfig, &device) != MA_SUCCESS)
{
ma_decoder_uninit(&decoder);
assert("Failed to open playback device.\n");
}

// play
if (ma_device_start(&device) != MA_SUCCESS)
{
ma_device_uninit(&device);
ma_decoder_uninit(&decoder);
assert("Failed to start playback device.\n");
}

ma_device_uninit(&device);
ma_decoder_uninit(&decoder);
}

I'm sorry if it is a dumb mistake, I really can't find why!

// Edit:
The example code provided is the simple_playback one in my code. If you need the other one (simple_playback_sine), just ask!

[mackron]

It's because your objects are going out of scope and getting destroyed. They're just plain structs. You need to ensure they stay valid. This is mentioned at the top of the documentation.

[Ar-Ess]

Okey, then I have to store them in the heap instead of the stack, right?
I read that on the documentation and still didn't notice it, I'm sorry for that!!

[mackron]

Yeah allocating on the heap is fine. Declaring them within another object is also fine so long as the parent object also stays valid.